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—The medium-access control (MAC) protocol is one of the key components in wireless local area networks (WLANs). The main features of a MAC protocol are high throughput, good fairness, energy efficiency, and support priority guarantees, especially under distributed contention-based environment. Based on the current standardized IEEE 802.11 distributed(More)
—This paper studies multihop optical networks in which nodes employ wavelength routing switches that enable the establishment of wavelength division multiplexed (WDM) channels , called lightpaths, between node pairs. In fact, most optical networks are multifiber networks. The problem of dynamical routing and assignment of wavelength (RAW) in such networks(More)
Wavelength division multiplexing (WDM) is an important technique for next-generation networks, which offers a viable solution to fully exploit the enormous bandwidth available in fiber optics. Optical layer multicast refers to the support of point-to-multipoint connections directly at the physical layer by employing passive devices known as power splitters.(More)
Similar to wired networks, appropriate buffer management strategy in wireless networks can manage the buffer efficiently, avoid or relieve congestion, so as to guarantee QoS. Because of unique issues in the wireless channel, strategies in wired networks can not apply directly to wireless network. In this paper, we propose a fair dropping algorithm called(More)
Segment protection has been recognized as an efficient way to avoid " traps " in survivable WDM mesh network. In this article, we present some insights on this kind of protection. We first prove the correctness of segment protection used for avoiding traps. We then investigate the effect of the number of segments on the blocking performance in several(More)
In order to improve the adaptability and fairness of RED, we replace the buffer occupancy of individual flow with a new introduced variable - sharing index to indicate the network resource share among difference flows. Through defining linguistic rules of both sharing index and queue length, a fuzzy logic based buffer management algorithm named FF-RED is(More)
Buffer management algorithms need to decrease queue delay as well as to improve throughput. Because of unique issues in wireless channels, providing delay guarantee in wireless networks is much more complex than that of wired networks. We propose a random early expiration detection based buffer management algorithm for real-time traffic over wireless(More)